×

RF transponder with resonant crossover antenna coil

  • US 5,541,399 A
  • Filed: 09/30/1994
  • Issued: 07/30/1996
  • Est. Priority Date: 09/30/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. An RF radio frequency transponder, comprising:

  • a substrate,an electrical transponder circuit on said substrate,an antenna coil on said substrate formed from multiple turns of an antenna line, with spaced locations on said antenna connected to couple an RF input signal to said circuit, one of said antenna locations being connected to said circuit through a lead that extends along a path that includes crossovers of the antenna turns, anda dielectric material separating said lead from said antenna turns at said crossovers to produce cross-over capacitances between said lead and said antenna turns,the width of said lead being substantially greater than the width of said antenna line at said crossovers to yield cross-over capacitances that collectively establish a resonant frequency for communicating with said circuit through said antenna coil at a predetermined RF frequency.

View all claims
  • 14 Assignments
Timeline View
Assignment View
    ×
    ×